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1A map showing locations of radio stations (now rare).
2Astronomy a diagram showing the strength of the radio emission from different parts of the sky or different parts of a celestial object.
1940s; earliest use found in Hispania.
雅致网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。